"Let's Do It" (song) (1954). These words were added to the original 1928 song, replacing lines including "Chinks do it, Japs do it" because Porter realized that those lyrics were offensive.
"Karl Pilkington On 'An Idiot Abroad,' Endangered Animals & Ricky Gervais (VIDEO)". Interview with Jordan Zakarin, www.huffingtonpost.com. January 20, 2012.